package basic.Callback;



public class BottomService {

    public void bottom(UpperService upperService, String param) {

        try {

            Thread.sleep(3000);

        } catch (InterruptedException e) {

            e.printStackTrace();

        }

        upperService.upperTaskAfterCallBottomService( param +" bottom callback upperTaskAfterCallBottomService() execute -->");

    }

}